La Marzocco · Espresso machine · Commercial
La Marzocco KB90 4 Group
The 4-group KB90 is La Marzocco's high-throughput evolution of the Linea PB, designed around a straight-in portafilter that locks without the usual wrist twist and an automatic steam flush that cleans the group between shots. With an independent boiler per group and optional drip-prediction scales, it is built for the busiest cafés where speed and consistency matter most.
AutomaticMulti-boiler boiler4 groupsPID
- Status
- In production
- Also known as
- KB90 AV 4gr · KB90 ABR 4gr
Record coverage 60%
20 sourced4 derived16 not published
Specification
Dimensions
| Field | Value | Evidence |
|---|---|---|
| Width129 cm | 1,290mm 50.8 in | Sourcedlamarzocco.com |
| Depth62 cm | 620mm 24.4 in | Sourcedlamarzocco.com |
| Height45 cm | 450mm 17.7 in | Sourcedlamarzocco.com |
| Weight | 122kg 269 lb | Sourcedlamarzocco.com |
Boilers and heat
| Field | Value | Evidence |
|---|---|---|
| Boiler system4 x 1.3 l independent coffee boilers (PDF) + steam 15 l; lamarzocco.com HTML table prints '3 x 1,3' for the 4 group (conflict; PDF '4 x 1,3' used) | Multi-boiler | Sourcedlamarzocco.com |
| Boilers4 x 1.3 l independent coffee boilers (PDF) + steam 15 l; lamarzocco.com HTML table prints '3 x 1,3' for the 4 group (conflict; PDF '4 x 1,3' used) | 5 | Derivedlamarzocco.com |
| Boiler volume4 x 1.3 l independent coffee boilers (PDF) + steam 15 l; lamarzocco.com HTML table prints '3 x 1,3' for the 4 group (conflict; PDF '4 x 1,3' used) | 20.2L 5.3 US gal | Derivedlamarzocco.com |
| Boiler materialOperating manual: boilers made of AISI 300 series stainless steel | Stainless | Sourcedlamarzoccousa.com |
| PID temperature controlOEM: PID control of coffee and steam boilers | Yes | Sourcedlamarzocco.com |
Pump and group
| Field | Value | Evidence |
|---|---|---|
| Brew pressureCoffee boiler operating pressure 9 bar (manual) | 9bar 131 psi | Sourcedlamarzoccousa.com |
| GroupIndependent saturated boiler per group; straight-in portafilter | Saturated | Sourcedlamarzocco.com |
| GroupsOEM spec-table column | 4 | Sourcedlamarzocco.com |
Water and steam
| Field | Value | Evidence |
|---|---|---|
| Water sourceMains-fed commercial machine | Plumbed | Sourcedlamarzocco.com |
| PlumbingUS installation guide: 3/8 in cold water supply and 3/4 in flexible drain line | Inlet and drain | Sourcedlamarzoccousa.com |
| Steam wandPro Touch steam wand | Cool-touch | Sourcedlamarzocco.com |
| Hot-water tapHot water economizer | Yes | Sourcedlamarzocco.com |
| Milk system | Manual wand | Sourcedlamarzocco.com |
Electrical
| Field | Value | Evidence |
|---|---|---|
| VoltageOEM (lamarzocco.com) lists 200 V single/3-phase, 220 V single/3-phase, 380 V 3-phase; La Marzocco USA lists 208-240 V single-phase 60 Hz for the US market | 200 / 220 / 380V | Sourcedlamarzocco.com |
| PowerOEM table: wattage min 8560 W / max 9850 W; lamarzocco.com HTML table instead prints 'Wattage Elements' not given | 9,850W | Sourcedlamarzocco.com |
| Heating elementmax wattage / 1000 | 9.85kW | Derivedlamarzocco.com |
| Phase | Single or three | Sourcedlamarzocco.com |
Features and price
| Field | Value | Evidence |
|---|---|---|
| TypeAV and ABR configurations; 3-button keypad | Automatic | Sourcedlamarzocco.com |
| DisplayOEM: digital display | LCD | Sourcedlamarzocco.com |
| Built-in grinderTraditional group-head machine; La Marzocco lists grinders as separate products (US installation guides specify a separate 110 V grinder supply) | No | Derivedlamarzocco.com |
Not published Cup clearance, Warm-up, Pump, Pressure profiling, Pre-infusion, Portafilter, Reservoir, Current, NSF listed, ENERGY STAR, CE marked, Shot timer, Output, Colours, Made in, List price. No manufacturer page or sheet we can cite gives these; they are left empty rather than guessed.
